I took the GMAT today(June 5). Really upset with my score... I never expected such a low score

I have always scored in the 710-750 range in GMATPrep and
MGMAT tests. (Q (49 -51) and V (38 - 42)).
Materials used - OG11 & 12,
MGMAT books, Kaplan, Princeton, solved few questions from 1000 series(SC,RC,CR). Knewton's course !
I think I need to work more on RC and CR and review the concepts in Quant.
Please suggest some strategies and study material which will help me in the second attempt !!
Thanks.
nsp